This 300mm is 30% shorter and about a pound and a half lighter than its predecessor, making it the worlds lightest 300mm full frame AF-S lens. The Phase Fresnal (PF) lens element improves sharpness, clarity, and virtually eliminates ghosting, flaring and chromatic aberration. The VR and Silent Wave Motor AF system make this lens quiet and fast. This prime telephoto is a must try for action shooters and wildlife photographers alike.